Ezzard Charles I don't think has been mentioned after being Heavyweight champ of the world he would later be fighting in High School Gyms for pittance and had Lou Gherigs disease which really crippled him. There's a pic i've seen of him in a wheelchair near the end and it just breaks the heart.

Tony Galento although a bit of a ***** had to have both of his legs amputated due to diabetes which would later kill him.